expat career Korea unpaid wages foreigner Korea employer no response Korea English jobs Korea JobKorea labor rights foreigners Korea foreign worker resignation company closed Korea visa foreign worker job change job change visa korea process foreign worker korea immigration reporting steps work visa korea change job korea visa Kowork foreign worker side job korea jobs in Korea for foreigners foreigner jobs Seoul non-teaching jobs Korea foreign worker unsafe work Korea work in South Korea 2025 Korea job search guide labor office foreign workers Korea visa violation part time korea foreign worker mistakes Korea Korea job platforms korea employment visa notice period korea foreign worker visa korea rules job change korea immigration work compliance employer shutdown foreign worker Korea quitting job Korea foreigner part-time jobs Korea job termination Korea foreigner foreign employment law korea teaching jobs Korea visa reporting timing Korea e7 visa job change korea fired in Korea visa Seoul Global Center foreign worker ghosted Korea visa reporting deadline Korea labor office communication Korea work visa status XpatJobs foreign worker job change korea freelance jobs Korea workplace change reporting Korea foreign worker unpaid salary Korea foreigner foreign worker reporting delay Korea work visa korea rules KOTRA job fair LinkedIn Korea visa sponsorship Korea Saramin resigning job korea